Overview
A Software-defined Wide Area Network, also known as an SD-WAN, is a virtual WAN structure. This architecture allows enterprises to leverage any sequence of transport services to connect users to applications securely. This controller uses a centralized control function to securely and intelligently direct traffic across the WAN and directly to trusted SaaS and IaaS providers. An sd wan controller increases application performance and delivers a high-quality user experience, which increases business productivity and agility, and reduces IT costs.
The SD-WAN architecture and its working
The traditional WAN is based on conventional routers never designed for the cloud. Hence they need up-gradation to work with the cloud software. They typically require backhauling all the traffic from branch offices to a hub or headquarters data center, including cloud-destined traffic. Advanced security inspection services can be applied to the incoming traffic at this center. This minimal delay caused by backhaul impairs application performance which results in losing productivity which in turn delivers a poor user experience. To provide a new-age solution for this problem, the sd wan controller is used, which has been designed to fully support applications hosted in on-premises data centers, public or private clouds, and SaaS services while delivering the most eminent level of application performance.
The SD-WANs are developed by securing encrypted channels or tunnels between sites. Every site is equipped with an SD-WAN device. Once connected to the local networks, those devices automatically download custom-defined arrangements and traffic policies. Then they establish tunnels with one another based on end-points or a point of presence (PoP), depending on the requirements of the network. An SD-WAN controls and manages the routing and traffic control between websites. The traffic that is outbound is routed along the optimum path based on application policies and real-time traffic conditions.
Conclusion
The SD-WAN technology allows businesses to make their network more efficient and dynamic when it comes to consuming network resources. A significant initial investment in new deployments is necessary, but the long-term savings potential inherent in the investment is also considerable. This type of network is best suited to businesses that boast multiple locations and heavy traffic. It allows efficiency to work on a heavy traffic network without many delays or disturbances. In order to achieve a fully-fledged network that allows smooth data traffic, one must opt for a complete SD-WAN network.
